package jdbc;

import com.alibaba.druid.pool.DruidDataSource;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

/**
 * 使用当前类维护数据库链接
 */
public class DBUtil {
    private static DruidDataSource dataSource;
    static{
        dataSource = new DruidDataSource();//实例化连接池
        dataSource.setUrl("jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true");
        dataSource.setUsername("root");
        dataSource.setPassword("root");
        dataSource.setMaxActive(10);//最大链接数
        dataSource.setInitialSize(5);//初始链接数

        /**
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        */
    }
    public static Connection getConnection() throws SQLException {
        return dataSource.getConnection();//在需要链接的时候,直接由连接池提供

                /**
                DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",
                "root");
                 */
    }
}
